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http://dx.doi.org/10.5515/KJKIEES.2017.28.12.933

Improvement of Power Transfer Efficiency Using Negative Impedance Converter for Wireless Power Transfer System with Magnetic Resonant Coupling  

Yoon, Se-Hwa (Department of Electrical and Electronic Engineering, Yonsei University)
Kim, Tae-Hyung (Department of Electrical and Electronic Engineering, Yonsei University)
Park, Jin-Kwan (Department of Electrical and Electronic Engineering, Yonsei University)
Kim, Seong-Tae (Amotech)
Yun, Gi-Ho (Department of Information and Communication Engineering, Sungkyul University)
Yook, Jong-Gwan (Department of Electrical and Electronic Engineering, Yonsei University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.28, no.12, 2017 , pp. 933-940 More about this Journal
Abstract
A wireless power transfer system with a negative impedance converter(NIC) was designed and tested. The system was investigated to identify the effects of ferrites and conductors. To improve the power transfer efficiency(PTE), the Q-factor of the transmitter was enhanced by the negative resistance generated by the NIC. The NIC was composed of an Op-Amp and resistors. The negative resistance was obtained with respect to a resistor connected in a feedback loop. The dimension of the Tx coil was $250mm{\times}250mm{\times}0.8mm$. The impedance and Q-factor were $31+j1874{\Omega}$ and 60, respectively. The negative resistance was selected to be $30{\Omega}$, and the Q-factor was increased to 900 by reduction of the transmitter resistance, which was about 15 times higher than that of a conventional transmitter. The measured PTE was greatly improved in comparison to that of a conventional system. These results demonstrate that the PTE is enhanced by using the NIC.
Keywords
Wireless Power Transfer; High Q-Factor; Negative Impedance Converter; Power Transmission Efficiency;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 최재훈, "무선전력전송 기술 동향 및 자기공명방식 안테나 설계," 전자공학회지, 38(9), pp. 23-30, 2011년 9월.
2 김진욱, 지현호, 최연규, 윤영현, 김관호, 박영진, "자기공명 무선전력전송 시스템에서 공진 코일의 배열에 관한 연구," 한국전자파학회논문지, 21(6), pp. 564-572, 2010년 6월.   DOI
3 A. P. Sample, D. T. Meyer, S. Member, and J. R. Smith, "Analysis, experimental results, and range adaptation of magnetically coupled resonators for wireless power transfer," IEEE Transactions on Industrial Electronics, vol. 58, no. 2, pp. 544-554, Feb. 2011.   DOI
4 M. Kiani, M. Ghovanloo, "The circuit theory behind coupled-mode magnetic resonance-based wireless power transmission," IEEE Transactions on Circuits and Systems I: Regular Papers, vol. 59, no. 9, pp. 2065-2074, Sep. 2012.   DOI
5 L. Chen, S. Liu, Y. C. Zhou, and T. J. Cui, "An optimizable circuit structure for high-efficiency wireless power transfer," IEEE Transactions on Industrial Electronics, vol. 60, no. 1, pp. 339-349, Jan. 2013.   DOI
6 강석현, 정창원, "자기공진형 무선전력전송 시스템의 소형화를 위한 공진기 설계," 한국전자파학회논문지, 27(2), pp. 163-169, 2016년 2월.   DOI
7 C.-C. Wu, H.-W. Chiu, D.-S. Lee, M.-H. Chang, C.-C. Lu, and C.-N. Chang, "High Q inductor design using modified magnetic substrate structure," in 2014 IEEE Wireless Power Transfer Conference, Jeju, 2014, pp. 284-287.
8 정인성, 최효상, "초전도 코일을 적용한 WPT 특성," 전기학회논문지, 62(6), pp. 762-766, 2013년 6월.   DOI
9 A. De Marcellis, G. Ferri, and V. Stornelli, "NIC-based capacitance multipliers for low-frequency integrated active filter applications," in 2007 Ph.D Research in Microelectronics and Electronics Conference, vol. 3, Bordeaux, Jul. 2007, pp. 225-228.
10 S. E. Sussman-Fort, R. M. Rudish, "Non-foster impedance matching of electrically-small antennas," IEEE Transactions on Antennas and Propagation, vol. 57, no. 8, pp. 2230-2241, Jun. 2009.   DOI
11 양혜민, 김강욱, "네거티브 임피던스 변환기에 기반을 둔 저항성 V 다이폴 안테나의 논 포스터 임피던스 매칭," 한국전자파학회논문지, 26(7), pp. 597-605, 2015년 7월.   DOI
12 S. Yamanaka, K. Matsumoto, and Y. Horii, "Theoretical study on operational-amplifier-based negative impedance converters with symmetrically allocated impedance elements," in 2015 Asia-Pacific Microwave Conference, Nanjing, Dec. 2015, pp. 1-3.
13 Y. Shen, T.-H. Chio, "Limitation of negative impedance converter using operational amplifier for matching electrically small antenna," in 2013 IEEE Antennas and Propagation Society International Symposium (APSURSI), Florida, 2013, pp. 1962-1963.
14 A. Bodrov, S.-K. Sul, "Analysis of wireless power transfer by coupled mode theory (CMT) and practical considerations to increase power transfer efficiency," in Wireless Power Transfer-Principles and Engineering Explorations, 2012.
15 J. E. Solomon, "The monolithic op amp: A tutorial study," IEEE Journal of Solid-State Circuits, vol. 9, no. 6, pp. 314-332, Dec. 1974.   DOI
16 김태형, 김병현, 윤기호, 이웅용, 육종관, "도선 폭이 지수적으로 감소하는 무선전력전송용 코일 설계," 한국전자파학회 하계종합학술대회, 2016년.
17 김종찬, 이승우, 강병남, 홍익표, 조인귀, 김남, "WPT 시스템의 누설자계 감소를 위한 전자파 차폐구조 개선," 한국전자파학회논문지, 28(1), pp. 61-68, 2017년 1월.   DOI
18 H. Hoang, F. Bien, "Maximizing efficiency of electromagnetic resonance wireless power transmission systems with adaptive circuits," in Wireless Power Transfer-Principles and Engineering Explorations, Intech, 2012.
19 S. Rajakaruna, F. Shahnia, and A. Ghosh, Plug in Electric Vehicles in Smart Grids, Springer, pp. 33-61, 2015.